Hjalma Diaz, of Manteca, California, gets a hug from his wife, Tammy, after he returned from Afghanistan with about 120 soldiers from a California Army National Guard Chinook helicopter unit after a year-long deployment on Tuesday, July 23, 2013, in Stockton, California. (Hector Amezcua/Sacramento Bee/MCT)

Stylist Jill Kipisz combs out the hair of Sharon Simons before cutting it at Just Hair salon in Eugene, Ore. Tuesday, July 23, 2013. Simons, who has been growing her hair for over 30 years, decided to have it cut and donated to Locks of Love, a non-profit organization that provides hairpieces to financially disadvantaged children suffering from long-term medical hair loss. (AP Photo/The Register-Guard, Brian Davies)

NEW YORK, NY - JULY 23: Filmmaker/film subject Nina Davenport is interviewed during the special screening of HBO Documentary "First Comes Love" at HBO Theater on July 23, 2013 in New York City. (Photo by Michael Loccisano/Getty Images for HBO)

ATLANTA, GA - JULY 23: Fans sit in the stands under an umbrella during a rain delay at the BB&T Atlanta Open in Atlantic Station on July 23, 2013 in Atlanta, Georgia. (Photo by Daniel Shirey/Getty Images)

Photo: Daniel Shirey, Getty Images

ATLANTA, GA - JULY 23: Fans sit in the stands under an umbrella...

ATLANTA, GA - JULY 23: Fans sit in the stands under an umbrella... Photo-4953509.66909 - SFGate

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A group of children cool off in the shallow water section at Aylesworth Creek Lake on Tuesday, July 23, 2013 in Jermyn, Pa. (AP Photo /The Scranton Times-Tribune, Butch Comegys) WILKES-BARRE TIMES-LEADER OUT; MANDATORY CREDIT

Photo: Butch Comegys, Associated Press

A group of children cool off in the shallow water section at...

A group of children cool off in the shallow water section at... Photo-4953508.66909 - SFGate

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NEW YORK, NY - JULY 23: A child looks out of a bank's window near where four people were recently shot on July 23, 2013 in the Brooklyn borough of New York City. Following a weekend in which 11 people were shot and wounded in Brooklyn alone, members of Save Our Streets (S.O.S.), a community-based effort to end gun violence, held a vigil and rally near where the four people were shot in Crown Heights on Sunday night. In response to the recent spate of shootings, the New York Police Department (NYPD) has set up stationary observation towers, added patrols and put additional plainclothes officers in high crime neighborhoods. S.O.S. holds the gatherings at all shooting locations in Crown Heights to draw attention to the violence and to encourage community response to the shootings. (Photo by Spencer Platt/Getty Images)

Photo: Spencer Platt, Getty Images

NEW YORK, NY - JULY 23: A child looks out of a bank's window near...

NEW YORK, NY - JULY 23: A child looks out of a bank's window... Photo-4953511.66909 - SFGate

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NEW YORK, NY - JULY 23: People pray at a rally near where four people were recently shot on July 23, 2013 in the Brooklyn borough of New York City. Following a weekend in which 11 people were shot and wounded in Brooklyn alone, members of Save Our Streets (S.O.S.), a community-based effort to end gun violence, held a vigil and rally near where the four people were shot in Crown Heights on Sunday night. In response to the recent spate of shootings, the New York Police Department (NYPD) has set up stationary observation towers, added patrols and put additional plainclothes officers in high crime neighborhoods. S.O.S. holds the gatherings at all shooting locations in Crown Heights to draw attention to the violence and to encourage community response to the shootings. (Photo by Spencer Platt/Getty Images)

Photo: Spencer Platt, Getty Images

NEW YORK, NY - JULY 23: People pray at a rally near where four...

NEW YORK, NY - JULY 23: People pray at a rally near where four... Photo-4953510.66909 - SFGate

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A man who did not give his name rests with his daughter on the beach under sunny skies Tuesday, July 23, 2013, in Coronado, Calif. Warm weather and blue skies brought summertime crowds to area beaches Tuesday, with more good weather forecasted on the way. (AP Photo/Gregory Bull)

Photo: Gregory Bull, Associated Press

A man who did not give his name rests with his daughter on the...

A man who did not give his name rests with his daughter on the... Photo-4953512.66909 - SFGate

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WATFORD CITY, ND - JULY 23: Jeff Allyn, a derrick hand with Raven Drilling, pauses with a cup of coffee while drilling for oil in the Bakken shale formation on July 23, 2013 outside Watford City, North Dakota. North Dakota is been experiencing an oil boom in recent years, due in part to new drilling techniques including hydrolic fracturing and horizontal drilling. In April 2013, The United States Geological Survey released a new study estimating the Bakken formation and surrounding oil fields could yield up to 7.4 billion barrels of oil, doubling their estimate of 2008, which was estimated at 3.65 billion barrels of oil. "If you're not working out here, there's no excuses. I went to prison for six years - it doesn't matter what your past is," Allyn said. (Photo by Andrew Burton/Getty Images)

Police ask Occupy Portland protesters to leave the area before workers washed the sidewalks in front of City Hall in Portland, Ore., Tuesday, July 23, 2013. The encampment of about 30 people, mostly homeless, was forced out by police five days after city workers hung eviction notices from nearby trees. (AP Photo/The Oregonian, Benjamin Brink) MAGS OUT; TV OUT; LOCAL TV OUT; LOCAL INTERNET OUT; THE MERCURY OUT; WILLAMETTE WEEK OUT; PAMPLIN MEDIA GROUP OUT

The Horry County Police Department's Bomb Squad and the Bureau of Alcohol Tobacco and Firearms held an explosives demonstration for the students in their law enforcement explosives class, Tuesday, July 23, 2013. Training continues through the week in the Myrtle Beach area, so local residents and visitors may hear loud explosions in the area. This blast launched this tire high in the sky. (AP Photo/The Sun News, Charles Slate)

Photo: Charles Slate, Associated Press

The Horry County Police Department's Bomb Squad and the Bureau of...

The Horry County Police Department's Bomb Squad and the Bureau... Photo-4953513.66909 - SFGate

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Firefighters move in Tuesday, July 23, 2013, on a white Pontiac Grand Am two-door car overturned in a deep ditch and on fire along the Homer Adams Parkway near Aberdeen Park in Alton. Several occupants of the car crawled out and to safety after the vehicle careened into the weed filled ditch along the southbound lanes of the highway. Several of the occupants, who appeared to be teenage girls, were transported to area hospitals with minor injuries. (AP Photo/The Telegraph, John Badman) THE NEWS-DEMOCRAT AND THE POST-DISPATCH OUT

The 700-foot central span of the old Madison-Milton Bridge falls into the Ohio River on Tuesday, July 23, 2013 in Madison, Ind., after a series of controlled explosions separated it from the rest of the superstructure. Using many small explosive charges placed at critical locations on the bridge, subcontractor Advanced Explosives Demolition Inc. (AED) detonated the charges in intervals to control the direction of fall. The 1929 Milton-Madison Bridge will be demolished in a series of three or four blasts about seven days apart over the next few weeks. (AP Photo/The Madison Courier, Ken Ritchie)

Photo: Ken Ritchie, Associated Press

The 700-foot central span of the old Madison-Milton Bridge falls...

The 700-foot central span of the old Madison-Milton Bridge falls... Photo-4953517.66909 - SFGate